Liquid fuel burner



Feb. 9, 1937. H, c. SHAGALOFF LIQUID FUEL BURNER Filed 0G12. l, 1934 3 Sheets-Shea?I 1 INVENT OR.

` /40'1 ATTORNEY.

Feb. 9, 1937. H. c. sHAGALoFF 2,069,857

LIQUID FUEL BURNER Filed oct. 1, 1954 sheets-sheet 2 INVENTOR.

M ATTORNEY.

Feb. 9, 1937. H. c. SHAGALQFF y 2,069,857

LIQUID FUEL BURNER Filed oct. 1, 1934 s sheets-sheet 5 INVENTOR,

@ ATTORNEY.

y Patented lFeb. 9, 1937 lUNITED STATES PAT-ENT OFFICE Y Iacass':

. LIQUID BURNER Harry C'. Shagaloff, Evansville, Ind., asslgnor, by

mesne assignments, to Servel, Inc., Dover, Del., a corporation of Delaware Application October 1, 1934, Serial No. 246,278

My invention relates to a liquid fuel burner and more particularly to a liquid fuel burner for a continuous absorption refrigerator, and it is an object of my invention to provide improved automatic regulation of such burner.

My invention, together-with the objects and advantages thereof, will fully appear upon reference to the following description and the accompanying drawings forming part of this specification and of which:

Fig. 1 is a broken side elevation, partly in vertical section, of a refrigerator 'embodying my invention;

Fig. 2 is a detail section of a burner taken on line 2-2 in Fig. 1;

Fig. 3 is a vertical section' taken online 3-3 in Fig. 2; and

Fig. 4 is a horizontal section taken on line 4--4 in Fig. 2.

Referring to Fig. 1 of the drawings, a refrigerator cabinet III provides a thermally insulated storage compartment I I accessible by means of a door I2, and an 'apparatus compartment I3 accessible by means of a door I4; In the cabinet I0 there is mounted an absorption refrigeration apparatus unit generally of the type disclosed in Patent 1,609,334 to von Platen et al. and including an evaporator or cooling element I5 1ocated in the storage compartment II and agenerator having ahorizontal portion I6 located in the apparatus compartment I3. The horizontal portion I6 of the generator is provided with an inner heating ue I'I and an outervheating ue I8, and is thermally insulated by a suitable material such as mineral wool IS-Ietained in place y by a light sheet metal casing 20. The forward end of the outer generator heating ue I8 projects through the forward end of the casing 20 and beyond theend oi' the inner ue I1, and is providedwith a suitable aperture 2I to-receive lthe upper end of a burner chimney 22. The forward end of the outer iue I8 and the upper endl of the burner chimney 22 are enclosed by are movable hood 23 which is retained in place by a suspension hook 24 and is provided with a suitable handle 25 for manipulation from the forward end of the apparatus compartment and which is accessible by means of the door I4. The burner chimney 22 is also removable for lighting and cleaning, being provided with asuitable handle 26 for ready manipulation. For a more detailed description of the cabinet and unit assembly, reference may be had to an application Serial No.

722,640 of William R. Hainsworth and an appli-" cation Serial No. 734,075-of William R. Hainsworth.

A kerosene burner is indicated generally in Fig. 1 Aby the reference numeral 2l and is connected to receive kerosene from a storage tank, not 5 shown, through a supply conduit 28. The structure of the burner will be more fully understood upon reference to the detail sectional views in Figs. 2, 3, and 4.. The burner includes a body casing 29, which may be a machined casting, pro- 10 -viding an inlet passage 30, `a oat chamber 3l, and a passage 32. The kerosene supply conduit 28 isconnected to one end of the inlet passage 3l).v Into the other end of the passage 30 is inserted a suitable bushing 33 having a valve passage 34 15 which provides communication yfrom the inlet passage 30 toward the float chamber 3l. The valve passage 34 opens from the inlet passage 33 into the interior of a flexible bellows 35, the lower end ofwhich is secured to a shoulder on the bushing 33. In the other end of the bellows 35 is secured a member 36 forming la valve member 31 adapted to close the valve passage 34, and having an opening from the interior of the .bellows 35 into the float chamber 3|, which opening is 25 formed by passages 33, '39, 4I), and 4 I The member 36 is guided for'vertical movement in a plate 42 secured within the casing 29 by screws 43.Y A Ashoulder abutment of member 36 against the guide plate 42 limits the upward movement of 30 member 36 under the'resilient expansion of the bellows 35, and downward movement of member 36 is limitedl by the seating of the valve member 31 to close the valve passage 34, as hereinafter described. It will be understood that a spring 35 may be used to augment the resiliency of the bellows 35. Within passage of the member 36 is one end of a valve rod 44, forming a valve member 45 adapted to cooperate with the passage 33 to control ow of liquid therethrough. The 40 upper end ofthe valve rod 44 is reciprocably guided in a tubular member 46 which is preferably formed integrally with the member 36 and is guided for vertical reciprocation in a bracketlike upward extension 4l of the' plate 42. 'I'he 45 upper end of the tube 46 is provided with a suitable cap plug 48.

Within the float chamber 3| is located'a oat 49 which may be, for instance, a hollow metal v shell. The oat 49 is secured to one forked end 50 of a lever 50. The other end of the lever 50 is also forked and operatively associated with the valve rod 44, the prongs of the'latter end extending into recesses 6I on opposite sides of the valve rod 44. The guide tube 46 is slotted to admit and 55 lio permit movement of the lever 50. Between the end connected to the float 49 and the end connected to the valve rod 44, the lever 58 is pivoted at 52 on Ithe lower part of a pivot post 53, so that upward movement of the float 49 causes downward movement of the valve Vrod 44 to close the valve 45. 'Ihe valve 45 may therefore be referred to as a float valve.

At the upper end of the pivot post 53 are pivoted a lever 54 and a lever 55. The lever 54 overlies the float 49 and is adapted to rest on the oat, whereby the weight of the lever 54 is added to the weight of the float. The lever 54 may therefore be referred to as a weight or weight lever. The outer end of the lever 55 extends into a slot 58 in the outer upturned end of the weight lever 54 and is normally urged upwardly by a spring 51.

This spring is sulciently strong to raise the Weight lever 54 from the float 49.

Above the lever 55 is located an expansible diaphragm 58 of an expansible uid thermostat. The expansible diaphragm 58 is centrally mounted on a resilient diaphragm 59 by means of a bushing 88. The diaphragm 59 is secured at its periphery under the edge of a llrst cover plate 8| secured on the casing 29, for instance, by means of screws 82. The expansible diaphragm 58 is connected by means of a capillary tube 83 to a sensitive bulb 54, forming an expansible fluid thermostat which contains a temperature sensitive uid. As shown in Fig. 1, the sensitive bulb 84 of the thermostat is located in thermal conductive relation with the cooling' element l5 in the storage compartment of the refrigerator.

Upon increase of temperature, of the cooling velement |5,- expansion ot the thermostat diaphragm 58 occurs, and 'upon decrease in temperature of the cooling element 5, the thermostat diaphragm 58 contracts. The thermostat may be adjusted by a screw 85 threaded through the cover plate 8| and forming an adjustable abutment for the bushing 88. Upon expansion of the thermostat diaphragm 58, the lever 55 is moved downwardly against the action of spring 51, thus lowering and releasing the weight lever 54 upon the float 49. In Fig. 2, the diaphragm 58 is shown in its expanded position, whereby the weight lever 54 rests upon the float 49. The weighted oat 49 is floated to close the valve 45 when liquid in the iloat chamber 3| reaches a level I. Upon decrease in temperature of the refrigerator cooling element l5, contraction of the thermostat diaphragm 58 occurs, whereupon lever 55, under the actlon'of spring 51, engages and raises the weight lever 54 from the iloat 49. The valve 45 will now remain closed until the liquid in the oat chamber 3| reaches a lower level II.

In operation of the device as thus far described, kerosene flows through the supply conduit 28, inlet passage 30, valve passage/34, past the normally open cut-olli valve 31 into the bellows 35. From the latter, the kerosene flows through passage 38, passage 39, past the float valve 45, and through passages 40 and 4| into the iloat chamber 3|. From the latter', kerosene flows through a v valve opening 88 (Fig. 4), past a manually adjustable valve 81, and through'passage 32 to a burner tube 88 which is connected to a lburner well 89. Flow of kerosene continues until the level I is reached in the float chamber 3|, assuming that the thermostat is vexpanded and the weight lever 54 is resting on the float 49. The flow of liquid from the float chamber 3| into the burner well passage 32 may be manually adjusted or cut on by the, valve 81.. Assuming that the burner has ratus is commenced at a high burner flame for the reason that the liquid is at a high level in the burner tube 88. Upon operation of the refrigeration apparatus, the temperature of the cooling element |5 is' reduced for cooling of air in the storage compartment and freezing ofwater, for instance, in ice trays 10 (Fig. l). When the temperature of the cooling element has been decreased a certain amount, ldepending upon the adjustment of the thermostat, the weight lever 54 is raised from the float 49, as previously described, and the level of liquid in the float chamber 3| and burner tube 88 recedes toward its minimumlevel II. As this level is approached, the burner ilame decreases and heating of the generator of the refrigeration apparatus is reduced. Thus, the burner llame is automatically regulated responsive to the refrigeration temperature.

I will now describe further parts of the illustrated device which function to protect the burner in the case of overflow of liquid fuel as, for instance, upon sticking or otherwise faulty operation of the iloat valve. Referring to Figs. 2 and 3,

the burner casing 29 is provided with a second cover plate 1| having an arch portion 12 which projects over one edge of the burner casing 29 (Fig. 3). Beneath the arch portion 12 of the cover plate 1| is a lever 13` which is pivoted near one end on a pivot post 14, the latter being preferably formed integrally with the cover plate 1|. From one end of the lever 13, which extends beneath the arch 12 outside of the burner casing 29, is tiltably suspended a bucket 15. To the other, shorter end of the lever 13 is connected one end of a coil spring 18. The other end of thespring 18 is connected to a suitable spring postl 1,1 which is secured to and extends downwardly from the cover plate 1 I. The spring 18 exerts. a downward tension on the short end of the lever 13 so that the longerv end of the lever 13 and the bucket 15 are normally maintained in and biased to an elevated position. The lever 13 may be referred toas a bucket lever. 'I'he burner casing 29 is provided with a suitable slot 18 to allow vertical oscillation of the bucket lever 1,3, as hereinafter described. At a level slightly above the safe maximum level of liquid Vin, the float chamber 3|, the burner casing 29 is provided with an opening 19. On the exterior of the burner casing 29, beneath the opening 19, is a spout which is preferably formed integrally with the casing 29. The spout 88 is directed into the open top of the bucket l5, so that liquid overilowing from the float chamber 3| through the opening 19 will be directed by the spout 88 into the bucket 15.

On another pivot post 8|, which is also preferably formed integrally with the cover platev 1I, there is pivoted a bellcrank lever 82. One end ofl the bellcrank 82 extends upwardly through slot 83 in the arch 12 of the cover plate 1|. The other end of `the bellcrank 82 is formed as a trigger which is adapted to be engaged by a catch 84 on the bucket lever 13 when the latter is in its elevated or normal position. The trigger end of the bellcrank 82 overlies the tubular guiding member 48 and abuts downwardly on .the cap plug 48 inthe upper end of the tube 48., 'I'he trigger end of the bellcrank 82 is placed under tension by means of a coil spring ward force is exerted by the bellcrank 82 on the tube 46.

If, during operation of the burner, liquid fuel should rise in the float chamberl 3| beyond a predetermined safe maximum level, as upon sticking or otherwise faulty operation of the oat valve 45, the liquid overflows through opening 19 and is directed by the spout 80 into. the bucket 15. When the added liquid increases the weight. of the bucket 15 suiciently to overcome the' tension of spring 16, the bucket 15 and the bucket lever 13 move from their normal elevated position to a lower position. This movement of the bucket lever 13 releases engagement of the catch 84 with the trigger end of the bellcrank 82. Thereupon, the spring 85 exerts a downward force on the trigger end of the bellcrank 82 against the upper end of the previously mentioned guide tube 46 which is vertically reciprocable in the plate 42 and its bracket-like extension 41. Under the forceexerted by the spring 85, the tube 46 and the member 36 are moved downwardly against the resiliency of the bellows 35 to the bucket guard 86. Upon operation of the.

safety device.' the bucket 15 has descended into the guard 86 in such manner that tipping of the guard causes tipping of the bucket. The guard 86, and consequently the bucket 15 may be tipped by pressing downwardly on the handle 88 which turns the guard 86 around its pivot on the pivot post 81. In this manner the overflow liquid may be emptied from the bucket 15 after operation of the safety device. After the bucket is emptied, the device may be reset by moving the projecting endv of the bellcrank '82 to raise the trigger end thereof against the action of the spring 85, until the trigger end `is again engaged by the catch 84 on the bucket lever 13 which has been returned to its normal position l upon emptying of the bucket. The member 36 and guide tube 46, now relieved from the downward force exerted by the spring 85, are raised to the previously described normalvor inoperative position by the resiliency of the bellows 35, and auxiliary spring if such be used, and the valve member 31 opens the passage 34,'and the normal, previously 'described operation of the burner may be resumed. Ifv the'burner flame has become extinguished, it will benecessary to relight the burner.

Lighting of the burner may be accomplished by closing the manually adjustable valve 61, priming the burner well 68 with liquid fuel if necessary, the chimney 22 being removed for this purpose, and applying a flame to a burner lighting wick. In Fig.. 2 is shown the lower end of a wick 90 which is provided to sustain combustion in the burner well 69 at low liquid levels. When such a wick is provided, it may be also used for lighting the burner. flame has become uniform and smokeless, the chimney 22 is replaced and the valve 61 opened to permit the previously described normal operation of the burner. The valve 61 may be A handle 88 is guided for,

When the burner advantageously adjusted to control the flow of liquid from the oat chamber 3l to the burner tube 68 by way of the burner passage 32 to determine the size of the burner ame for a given liquid level in the 'float chamber.

What I claim is: y 1. A kerosene burner for a continuous absorption refrigerator including a burner well, a float chamber, a valve for regulating inletof kerosene tov said float chamber and burner well, a float 'in said float chamber operatively connected to.

said valve, a first lever overlying and adapted to rest upon said ioat, a second lever operable to engage and disengage said first lever to respectively raise and lower said first leverv with respect to said float, a spring urgingsaid second lever to engageand raise said first lever from said float, and an expansible iiuid thermostat arranged to move said second lever against the action of said spring to lower and disengage said first lever upon said float responsive to increase in temperature. x

2. A kerosene burner for a continuous absorption refrigerator including a valve for controlling flow of kerosenel to said burner, a float for operating said valve responsive to liquid level of kerosene in the burner, a first lever overlying and adapted Ito rest upon said iioat, a second lever operative to engage and disengage said j rst lever to respectively raise and lower said first lever with respect to said oat, means urging said second lever to engage and raise said fluid thermostat arranged to movejsaid second lever against the action of said means to lower andl disengage said first lever upon said oat responsive to increase in temperature.A

3. A kerosene burner for a continuous absorption refrigerator including a fuel control valve, a float fdr operating said valve, a weightv adapted to rest upon said float, a lever operative to engage and disengage said weight to respectivelyraise and lower lsaid weight with respect to said iioat, means urging said lever to engage and raise said weight-from said oat, 4and a thermostat arranged to move said lever against the action of said means to lower and disengage said weight upon said float responsive to increase in temperature.

4. A kerosene burner for a continuousl absorp'- tion refrigerator including a fuel control valve, a

' oat, a first means operatively connecting said valve to said float, a weight adapted to rest upon said float, a second means normally operative to remove said weight from said float, and a. thermostat' arranged to modify the operation of said second means to rest said weight upon said float responsive to increase in temperature.

'5. A liquid fuel burner including a fuel control valve, a float, a first means operatively connecting said valve to said iioat, a weight, and a second means to automatically add said weightv to said float and remove the weight from the oat responsive to changes in temperature.

7. A liquid fuel burner, means for supplying liquid fuelto said burner, a oat adapted to be buoyed by liquid fuel flowing to said burner, a valve forcontrolling ow of liquidfuel to the 'niA burner, a iirst means operatively connecting said valve to said oat, and thermostatlcally operable means for adjustably weighting said float.

8. A liquid fuel burner in which the heat vpro-- duced varies with the level of liquid fuel in the burner and including a valve for controlling flow of liquid fuel to the burner, afloat, a rst means operatively connecting said valve to said oat, and a. second means for adjusting the weight of said 10 float.

9. A liquid fuel buner for an absorption type refrigerator including a fuel control valve, a oat, means operatively connecting said valve to said iioat, a weight adapted to rest upon said oat, a second means to engage and disengage said weight to respectively raise and lower said weight with respect to said float, and la thermostat arranged to operate said second means to lower and disengage said weight upon said oat responsive to increase in temperature.

HARRY c. SHAGAIDFF. 1o 

